5/1/26, 6:56 NPDES Exam flashcard sets |
AM
NPDES Class EXAM, Complete Test || Questions and Answers
(Verified Answers) (Latest Update 2026) UPDATE!!
Erosion
is the process by which the land surface is worn away by the action of wind, water, and
gravity.
Sedimentation
is the settling out of soil particles transported by water and wind.
Soil erosion can be classified as 2 types. What are they?
Wind and Water.
What are the two sources of Soil erosion.
Natural and Manmade
Water erosion can be classified as two type of erosions. What are they?
Overland and Stream/Channel erosion.
Four process of overland erosion are?
Splash, sheet, rill, and gully erosion.
Four principle factors influencing soil erosion are?
Soil characteristics, vegetative cover, topography, and climate.
List three physical effect of erosion and sedimentation:
Increased flooding reduced hydraulic capacity in rivers, and streams; increased
maintenance of stormwater systems.; increased water treatments cost; and decreased
recreational value.
List three biological effect of erosion and sedimentation:
Reduced light for aquatic plants; clogs fish gills; impairs spawning; disrupts food chain;
blankets bottom, suppresses aquatic life; and disrupts ecosystem.
1/16
,5/1/26, 6:56 NPDES Exam flashcard sets |
AM
Planning the development to fit the terrain using the particular:
2/16
, 5/1/26, 6:56 NPDES Exam flashcard sets |
AM
Topography; soils; drainage patterns; natural vegetation of the site; and minimize the
extent of the area exposed at one time and the duration of exposure.
Perimeter Control Practices
What you apply to protect the disturbed area from off-site runoff and to protect off-site
areas from sediment damage.
Erosion Control Practices
What you apply to prevent excessive on-site damage.
Keep runoff velocities and runoff on the site
Low and retain
When do you stabilize disturbed areas after final grading to prevent raindrop impacts from
causing erosion.
Immediately
Implement a thorough and (inspection) program as required in the
Construction Generic Permit (CGP).
maintenance and follow up
Soil particles smaller than 0.002 mm are classified as and along with are the two
soil types that cause the most erosion/turbidity problems in Florida and the World.
clay and muck
Soils in the Type A hydrologic group have infiltration rates and runoff potential
even when thoroughly wetted.
high and low
Soils in the Type D hydrologic group have very infiltration rates and runoff
potential when thoroughly wetted.
low and high
What is the rainfall erosion index?
3/16
AM
NPDES Class EXAM, Complete Test || Questions and Answers
(Verified Answers) (Latest Update 2026) UPDATE!!
Erosion
is the process by which the land surface is worn away by the action of wind, water, and
gravity.
Sedimentation
is the settling out of soil particles transported by water and wind.
Soil erosion can be classified as 2 types. What are they?
Wind and Water.
What are the two sources of Soil erosion.
Natural and Manmade
Water erosion can be classified as two type of erosions. What are they?
Overland and Stream/Channel erosion.
Four process of overland erosion are?
Splash, sheet, rill, and gully erosion.
Four principle factors influencing soil erosion are?
Soil characteristics, vegetative cover, topography, and climate.
List three physical effect of erosion and sedimentation:
Increased flooding reduced hydraulic capacity in rivers, and streams; increased
maintenance of stormwater systems.; increased water treatments cost; and decreased
recreational value.
List three biological effect of erosion and sedimentation:
Reduced light for aquatic plants; clogs fish gills; impairs spawning; disrupts food chain;
blankets bottom, suppresses aquatic life; and disrupts ecosystem.
1/16
,5/1/26, 6:56 NPDES Exam flashcard sets |
AM
Planning the development to fit the terrain using the particular:
2/16
, 5/1/26, 6:56 NPDES Exam flashcard sets |
AM
Topography; soils; drainage patterns; natural vegetation of the site; and minimize the
extent of the area exposed at one time and the duration of exposure.
Perimeter Control Practices
What you apply to protect the disturbed area from off-site runoff and to protect off-site
areas from sediment damage.
Erosion Control Practices
What you apply to prevent excessive on-site damage.
Keep runoff velocities and runoff on the site
Low and retain
When do you stabilize disturbed areas after final grading to prevent raindrop impacts from
causing erosion.
Immediately
Implement a thorough and (inspection) program as required in the
Construction Generic Permit (CGP).
maintenance and follow up
Soil particles smaller than 0.002 mm are classified as and along with are the two
soil types that cause the most erosion/turbidity problems in Florida and the World.
clay and muck
Soils in the Type A hydrologic group have infiltration rates and runoff potential
even when thoroughly wetted.
high and low
Soils in the Type D hydrologic group have very infiltration rates and runoff
potential when thoroughly wetted.
low and high
What is the rainfall erosion index?
3/16
